Petrochemical certificates are usually not difficult and easy to get. Judging from the relevant public information, it is usually not difficult and easy to obtain a refueling permit. Usually, you only need to master the basic knowledge of refueling to pass the exam, and people working on oil tankers or chemical tankers need to obtain a refueling license. Obtaining a certificate requires systematic training. After attending the certificate training, you must go to an oil tanker for three months. After you have experience in oil tanker, you can go back to the Maritime Safety Administration to apply for a new certificate. Oil syndrome is a combination of original oil syndrome and chemical syndrome. The training of petrochemical certificate is divided into three items, namely T0 1, T02 and T03, which are also frequently mentioned. To engage in oil tanker work, you only need to train T0 1 and T02, but you can engage in chemical tanker training T0 1 and T03.